doctrine2约束违规 [英] doctrine2 constraint violation

问题描述

我拥有以下实体：

/**
* Acme\DemoBundle\Entity\Book
*
* @ORM\Table(name="book")
* @ORM\Entity(repositoryClass="Acme\DemoBundle\Repository\BookRepository")  
* @ORM\HasLifecycleCallbacks  
* @UniqueEntity(fields="publickey", groups={"publickey"})
*/
class P1guestlistentry {
/**
 * @var P1guestlistentrystatistic
 *
 * @ORM\OneToOne(targetEntity="P1guestlistentrystatistic", orphanRemoval=true, cascade={"all"}, fetch="EAGER")
 * @ORM\JoinColumns({
 *   @ORM\JoinColumn(name="fkstatistic", referencedColumnName="pkId", nullable=false)
 * })
 */
private $fkstatistic;

当我尝试删除如下这样的对象：

When I try to remove an object like here:

$this->getEntityManager()->getConnection()->beginTransaction();
try{

     $book = $this->getEntityManager()->getRepository('AchmeDemoBundle:Book')->find(3928);
     $this->getEntityManager()->remove($book);
     $this->getEntityManager()->flush();
     $this->getEntityManager()->getConnection()->commit();         
   }catch(Exception $e){
     $this->getEntityManager()->getConnection()->rollBack();
     echo $e->getMessage();
   }
exit;

我可以做任何我想要的，我收到以下错误：

I can do whatever I want, I get the following error:

使用params {1：3928}执行DELETE FROM book WHERE pkId =？时发生异常：SQLSTATE [23000]：违反完整性约束：1451无法删除或更新父行：外键约束失败（ p1 。书，CONSTRAINT FK_F51A442F78734022 FOREIGN KEY（ fkstatistic ）参考 bookstatistic （ pkId ））

An exception occurred while executing 'DELETE FROM book WHERE pkId = ?' with params {"1":3928}: SQLSTATE[23000]: Integrity constraint violation: 1451 Cannot delete or update a parent row: a foreign key constraint fails (p1.book, CONSTRAINT FK_F51A442F78734022 FOREIGN KEY (fkstatistic) REFERENCES bookstatistic (pkId))

有一个想法我在做错什么？
我尝试了很多方法，但没有任何帮助。

Has anbybody an idea what I'm doing wrong? I tried a lot of methods but nothing helps.

推荐答案

如果有人遇到类似的问题，解决方案：

In case someone runs into a similar issue, here is the solution:

/**
 * @var statistic
 *
 * @ORM\OneToOne(targetEntity="statistic", cascade="ALL")
 * @ORM\JoinColumns({
 *   @ORM\JoinColumn(name="fkStatistic", referencedColumnName="pkId", onDelete="SET NULL")
 * })
 */

onDelete 选项将首先删除关系，然后doctrine将执行级联操作。

The onDelete option will remove the relation first and then doctrine will do the cascade operation.

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